Dredging-bucket.



Nu. 709,420. l Patented sept. I6, |9112.

c. PAY.

DBEDGING BUCKET.

(Implication mea my 1e, 1902.)

(No Model.)

No. 709,420. Patented Sept. I6, |902.

` c. PAY. DREDGING BUCKET.

` (Application led May 16, 1902.)

`(No IModel.)

. `same.` f

Myinvention relates to dredgingfmachines,

UNITED STATES PATENT jOFFICE.

` `CHARLES PAY, oF PROVIDENCE, RHODE ISLAND.

DR-EDeiNG-BUcKE-T.

`SPIEIQIFIGATION forming part of Letters Patent No. 709,420, dated September 16, 1902.

" Application ned My It. 1902. serial No. 107.630. or@ man.)

To all whom/.it r11/ty concern/.1

`Be it `known that I, CHARLES PAY, a` citizen of the-United States,l.residing. at the cityof Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Dredging- Buckets, fof which-.the following is a specififrontele'vation of the same.

Fig. `5 is an enlarged detail view as seen on lineZ Z-ofFig.2V Fig. 6 is a side elevation of my improved machine asseen when the bucket is open. Fig. 7 is a top plan `viewof one-half of .the bucket lwhen open. Fig. S is side elevation ofA said machine as seen when the bucket is closed. Figs. 9, 10, and 11 are det-ail Views of thecam-shaft box,`Fig. 9 lbeing a side elevation thereof, Fig. 10 atop plan, and Fig. 11 a `front elevation, of the and moreparticularly to the bucket thereof `andmeans for its operation;` and it' consists of the novelconstrution and combination of n the several parts,as hereinafter described ,and ,n specifically set forthinthe claims.

`In. the drawing i 1 1 are the polesor sup# `ponts vupdon'which'the working parts are held in position.` On each pole 1 is a rectangular plate 2, having awidth exceeding the diameter of said pole, asseen in Fig. 4.

3 3- are anglef'irons, andy bolts 4 4 connect said angleirons to the .plate 2Y A crossybar 6 extends from one pole 1 to-the `other, and centrally mounted thereon is a pulley7, whose axle 8 is supported in brackets 9, the latter being fastened to the cross-bar 6 by bolts 10. Asupplementalcross-bar 11 is bolted at 12 to the cross-bar 6 and has its two `ends bent, as seen at 1'3. Between the side of the bentend `of the bar 11 and the inner sideof the angle-iron V3 is inserted the strip 14, and between the side of the cross-bar 6 and the other angle-iron 3 is inserted the strip 15. n. These strips`14 and 15 extend the whole length of the plate 2. -`In the space between bars, asseen" in Fig. 4, and are secured in place by the nuts 2O and plates 21,`as seen in Figs. 2 and 4. y A ring 22 of a chain 23 is secured in a ring-bolt or swivel 24. The shaft 1S is kept from turning by having its ends made fiat where they enter the blocks 16 1Gi, as illustrated at `in F-ig. 5. n i On the plate 2 is bolted at'26` a yoke or U- shaped band 27, through which the pole 1 passes. 2 is a similar yoke 28, in whichthe lower end of the pole lis seated. at to the yoke 28, closes thebottom of the yoke 28, as shown in Figs. 2 and 8. i

There are two cam-shaft boxes 31, (shown in detail in Figs. 9, 10, and 11,) and each of these,boxes is made in one piece ofcast-steel to withstand the greatest strain at that point of the frame where the cam-shaft 36 is mounted, and these boxes are grooved at each end to receive the strips 14 and 15, which are secured to the boxes by the bolts A hole 3 5 is made in each of the boxes 31,| through which the cam-shaft 361 passes rotatably, and the lower portions of each of the boxes have ears 33 33, through which project bolts 4S 4S, which are held stationary by the pin 48, hwhich passes through them, as seen in top plan of Fig. 10. ,The cam-shaft 36 has the pulley 37 fastened thereon. Achain 38 is fastened at its lower end by a bolt 39 tothe grooved'periphery of the pulley 37, and `said chain 38 passes up behind the pulley 7, as seen in Figs. 1, 2, 3, (5, and 8. On the shaft 36 are alsosecured two cams 40.` A chain 41 is fastened at its lower end to each cam 40. A collar 42 is mounted on the shaft 36and is provided with ears 43, between which the upper end of the chain is pivotally mounted. Said cams have parallel anges on their peripheries, as illustrated in Figs.` 1, 2, and 6.

The dredging-bucket consists of two shells or scoops 44, and each of these scoops has straight parallel sides and also has a `spher- At or near the bottom ofthe plate- A bent strip 29, bolted IOO ` ically-shaped'bottom. It is strengthenedfby the riveted ribs 45, as shown in Figs. 2 and 7, and by the metallic straps or bands 46, as shown in Figs. 1, 6, and 8. Earpieces 47 are provided onueach scoop 44, and bolts 48, passing through said earpieces 47, pivotally conn'e'ct them with the earpieces 33 of the camshaft box. Each scoop 44 has brackets 49, which are strengthened by braces 50, and tWo bail-arms 5l and two other bail-arms 52 are pivotally mounted at their lower ends, respectively, to the brackets 49, contiguous thereto, by bolts 53a. At their upper ends said bail-arms 5l 52 have rings or collars 53 54 integral therewith and through which collars the shaft 18 passes. On the sides of each collar 42 are collars 55 56, abutting it y and held to the shaft 36 by set-screws.

Having thus described the parts of said machine, I will now explain its operation. When the dredgingbucket descends and rests upon the river mud bottom which is to be scooped up,`the parts are in the position shown in Fig. `6. The scoops 44 are here shown as open to their widest extent and the sharp digging edges thereof' (designated in said figure as 57) are in contact with the soil which is to be excavated. When the scoops 44 are in this position, the bolt 39, by which the end of the -chain 38 'is'fastened to the periphery of the pulley 37, is at the part of the pulley 37 then uppermost. The chain 23 is -let down and the chain 38 is pulled up at the same time. The pull on the chain 38 turns the pulley 37 andthe shaft 36, to which said pulley is fastened. The rotation-of the shaft 3,6, so caused, turns the cams 40 40, secured thereto. This turning of the cams 40 40 winds up the chains 41 4l and so draws down the shaft 18 and the sliding blocks 16 16, on which the ends of said shaft 18 are mounted, the blocks 16 sliding between the guides or strips 14 15. The result of this pull upon the chain 38 therefore results in the closing' of the scoops 44 44, and theparts are then in the position shown in Figs. 1 and 8. This downward movement of the shaft 18 pushes the bail-arms 51 52 and' brings together the edges 57 57 of the scoops 44 44, thus biting into the soil and filling the scoop-bucket. When the bucket has been elevated and swung into discharging position by the well-known means, (not shown,) the chain 23 is pulled and the chain 38 is let n out. At the beginning of this upward moverangement shown and described the power exerted to close the scoops is applied to the cams 40 40 ontheir shortest radii, and consequently with greater degree and at the same time with a less tendency to lift the bucket o'ut of the soil. As the scoops are closing the chains 4l are wound on the cams 40 on increasing radii, and when lthe scoops are entirely closed together the chains 4l are pulling on the cams 40 on theirlongest radii. When the bucket has been lifted and is ready to be emptied'by the opening of the scoops, the tension is changed from the chain 38'to the chain 23. in the usual and well-known manner and the leverage upon the cams'proceeds in the reverse order, thus facilitating a quick discharge of the bucket-load. The spherical form of the bottoms of the scoops adapts them more easily to excavate the wet soil, and the application of the power of the arms 5l 52 to said scoops at the centers ot their digging edges 57 gives to the scoops the best penetrating ability.' By this const-ruction the maximum of closing and opening power is given to the scoops at the times and intervals when they respectively are most needed.

Itis obvious that this device is applicable dry soils, or for hoisting or elevating coal, grain, or other substances.

I claim as a novel and useful invention and desire to secure by Letters Patent- 1. In adredging-machine, the combination of a bucket consisting of two sections or scoops, each of which has straight parallel sides and also a segmental-shaped bottom, said Yscoops pivotally mounted on a proper support, bail-arms connected with said scoops respectively at the digging edge of each, and means adapted to operate said arms for the purpose of f opening and closing said scoops, substantially as shown and described.

2. In a dredging-machine, the combination of a bucket comprising two scoops pivotally mounted on a proper support, a properlymounted cam-shaft, a pulley fixed on said shaft, two cams fixed on said shaft and each having avolute periphery, alifting-bar, bailarms mounted on said bar and connected with said scoops respectively, a chain adapted to raise and lower said bar, a chain adapted to rotate said pulley, and two chains mounted on said bar and adapted to operate said cams respectively, substantially as speciiied.

3. Ina dredging-machine having a suitable frame provided with guideways, and two caststeel blocks each of which is rigidly secured at the lower portion of said frame, in combination therewith, of a bucket comprising two scoops pivotally mounted on said blocks, a shaft rotatably mounted on said blocks, two cams rigidly secured on said shaft and each having a volute periphery, a lifting-bar movable in the guideways of said frame, bailarms mounted on said bar and connected to said scoops respectively at the centers of the diggingedge of each and means adapted to operate said arms in opening and closing said scoops, substantially as shown and described.

ICO

IIO

4. In a dredging-machine having suitable l piece and secured to said guideways between guideways, the combination therewith, of

the lower portion thereof, a camshaft mounted rotatably in said blocks, and a bucket comprising two scoops pivotally mounted on said blocks andsuspended beneath the said camshaft, substantially as shown and described.

In testimony whereof I afx my signature in presence of two Witnesses.

CHARLES PAY.

cast-steel blocks movable in said guideways, the lifting-bar, the shaft attached to said bar and having its ends mounted in said blocks, the bucket comprising two pivotally- I mounted scoops, and arms extending from I said shaft to said scoops, respectively, substantially as specied. t

5. In a dredging-machine having suitable guideways, the combination therewith, of cast-steel blocks each of which is made in one Witnesses THOMAS LooKE, ELMER WALKER. 

